CN219477199U - Rolling rotary electric transmission device - Google Patents
Rolling rotary electric transmission device Download PDFInfo
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- CN219477199U CN219477199U CN202223560360.6U CN202223560360U CN219477199U CN 219477199 U CN219477199 U CN 219477199U CN 202223560360 U CN202223560360 U CN 202223560360U CN 219477199 U CN219477199 U CN 219477199U
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- flexible
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model discloses a rolling rotary electric transmission device, which is characterized in that an inner conducting ring is arranged on a rotating shaft, an outer conducting ring is arranged on a shell, a first groove is formed in the inner conducting ring, and a second groove is formed in the outer conducting ring, so that the positions of the first groove and the second groove are opposite; mounting a flexible ring between the first groove and the second groove for continuous electrical transmission from the inner conductive ring to the outer conductive ring; a plurality of loops are overlapped along the axial direction, and each loop consists of an inner conductive loop, a flexible loop and an outer conductive loop; an inner insulating ring is arranged between two adjacent inner conductive rings, an outer insulating ring is arranged between two adjacent outer conductive rings, a bearing is not required to be installed, the structure is simple, the environmental adaptability is strong, the friction and wear is small, the reliability is high, the resistance fluctuation is small, the electrical noise is small, and the rotation service life can reach more than one hundred million rotations.
Description
Technical Field
The utility model belongs to the technical field of rotary electric transmission, and particularly relates to a rolling rotary electric transmission device.
Background
The utility model aims to provide a rotary electric transmission device which is mainly used for transmitting electric power and signals from a rotating part to a fixed part when a load continuously rotates by 360 degrees. The slip ring is one of the common rotary electric transmission devices, and electric power and signals are transmitted through the sliding contact between the elastic pressure of the brush wire and the ring groove, and the contact form is sliding contact, so that the friction moment is large, the contact surface is worn, the resistance fluctuation is large, the electric noise is high, and the service life is short.
The rolling ring replaces sliding contact of the electric brush and the slip ring groove by rolling contact of the flexible ring and the inner and outer conductive rings, friction moment is obviously reduced, and no abrasive dust is generated, so that the contact friction pair has longer service life and is more reliable. Meanwhile, the deformation of the flexible ring increases the electric contact area between the conductive parts, and the electric contact performance is greatly improved. Therefore, the rolling ring has the advantages of long service life and high performance compared with the traditional slip ring, and is applied to international space stations. But the rolling ring structure that adopts on the space station is comparatively complicated, in order to guarantee to transmit great power and transmission reliability, has installed a plurality of flexible rings between inside and outside conducting ring, in order to avoid the flexible ring to appear colliding in the rotation in-process, has still set up idler structure and has separated flexible ring. In addition, the rolling ring of the space station has lower rotating speed, and the accumulated rotating number is in the millions of rotating numbers, so that the space station is not suitable for the electric transmission requirement of a high-speed rotating scanning mechanism.
Disclosure of Invention
The object of the present utility model is to provide a rolling rotary electric transmission device, which realizes continuous electric transmission from a rotating part (inner conductive ring) to a fixed part (outer conductive ring) by rolling contact of a flexible ring between an inner conductive ring and an outer conductive ring. The bearing is not required to be installed, the structure is simple, the environmental adaptability is strong, the friction and wear are small, the reliability is high, the rotation number of turns can reach more than one hundred million revolutions, and the long-service-life electric transmission requirement of a high-speed rotation scanning mechanism can be met.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
a rolling rotary electric transmission device comprising: the device comprises a rotating shaft, a shell, an inner conductive ring, an outer conductive ring, a flexible ring, an inner insulating ring and an outer insulating ring;
the inner conductive ring is arranged on the rotating shaft, the outer conductive ring is arranged on the shell, a first groove is formed in the inner conductive ring, a second groove is formed in the outer conductive ring, and the positions of the first groove and the second groove are opposite;
the flexible ring is arranged between the first groove and the second groove and is used for realizing continuous electric transmission from the inner conductive ring to the outer conductive ring;
overlapping a plurality of loops along the axial direction, wherein each loop consists of the inner conductive loop, the flexible loop and the outer conductive loop; the inner insulating rings are arranged between two adjacent inner conductive rings, and the outer insulating rings are arranged between two adjacent outer conductive rings.
According to an embodiment of the present utility model, the first groove and the second groove are both double-layer groove structures and are W-shaped; and the flexible rings are arranged in each layer of groove, and two layers of grooves are connected in parallel to complete electric transmission of one ring, so that backup of the flexible rings and the inner and outer conductive rings is realized, and the reliability is improved.
According to the embodiment of the utility model, the flexible ring is arranged in each layer of groove, the relative position of the flexible ring in the circumferential direction is unconstrained, the flexible ring can roll freely, an idler wheel structure is not needed, the flexible ring can adapt to high-rotation-speed rotation, collision or motion interference of the flexible ring during rotation is avoided, and meanwhile friction force generated during operation is reduced.
According to an embodiment of the utility model, the diameter of the flexible ring is larger than the distance between the first groove and the second groove, so that the flexible ring is in reliable contact with the inner conductive ring and the outer conductive ring. The flexible ring has a pre-compression amount that brings about a contact stress below the fatigue limit stress of the material with a margin such that the flexible ring does not experience fatigue failure.
According to an embodiment of the present utility model, the inner insulating ring includes a radial inner insulating ring for insulating the inner conductive ring from the rotating shaft, and an axial inner insulating ring for insulating between two adjacent inner conductive rings. The outer insulating ring comprises a radial outer insulating ring and an axial outer insulating ring, wherein the radial outer insulating ring is used for insulating the outer conductive ring from the shell, and the axial outer insulating ring is used for insulating the adjacent two outer conductive rings. A small rotating gap is reserved between the axial inner insulating ring and the axial outer insulating ring, so that the reliable insulation of adjacent loops is ensured, and meanwhile, the entering of redundant substances can be prevented.
According to an embodiment of the utility model, labyrinth sealing structures are fixedly arranged at two ends of the loops, so that foreign objects are prevented from entering the loops.
According to one embodiment of the utility model, one end of the loops is provided with an inner spring assembly for providing an axial pre-tightening force to the inner conductive ring and an outer spring assembly for providing an axial pre-tightening force to the outer conductive ring. The inner conductive ring and the outer conductive ring can be ensured to keep correct relative positions under the environments of vibration, impact, high and low temperature and the like.
By adopting the technical scheme, the utility model has the following advantages and positive effects compared with the prior art:
1) According to the rolling rotary electric transmission device, continuous electric transmission from the rotating part to the fixed part is realized through rolling contact of the flexible ring between the inner conductive ring and the outer conductive ring, so that the friction and wear are small, the reliability is high, the resistance fluctuation is small, the electric noise is small, and the rotating life can reach more than one hundred million revolutions.
2) Each ring realizes backup through an axial double-layer structure, and each layer is only provided with one flexible ring, so that the flexible ring can be prevented from collision during rotation without an idler wheel while the reliability is ensured, the structural design is simplified, and the friction force is reduced.
3) When the device is used, the device is supported by the assembled mechanism bearing, the bearing does not need to be independently installed, and the device is ensured to have certain radial rigidity by reasonably designing the precompression amount of the flexible ring, so that the service life requirement is met.
Drawings
FIG. 1 is a cross-sectional view of a rolling rotary electric transmission device in an embodiment of the utility model;
fig. 2 is a schematic diagram of a rolling friction pair of a rolling rotary electric transmission device according to an embodiment of the present utility model.
Reference numerals illustrate:
1: a rotating shaft; 2: a housing; 3: an inner conductive ring; 4: an outer conductive ring; 5: a flexible ring; 6: an inner insulating ring; 601: a radially inner insulating ring; 602: an axially inner insulating ring; 7: an outer insulating ring; 701: a radially outer insulating ring; 702: an axially outer insulating ring; 8: labyrinth sealing; 9: an inner spring; 10: an inner spring pressing plate; 11: an outer spring; 12: an outer spring pressure plate.
Detailed Description
The rolling rotary electric transmission device according to the present utility model will be described in further detail with reference to the accompanying drawings and the embodiments. Advantages and features of the utility model will become more apparent from the following description and from the claims.
As shown in fig. 1, the rolling rotation electric transmission device comprises a rotating shaft 1, a shell 2, an inner conductive ring 3, an outer conductive ring 4, a flexible ring 5, an inner insulating ring 6, an outer insulating ring 7, a labyrinth seal 8, an inner spring 9, an inner spring pressing plate 10, an outer spring 11 and an outer spring pressing plate 12. As shown in fig. 2, wherein the inner insulating ring 6 comprises a radially inner insulating ring 601 and an axially inner insulating ring 602; the outer insulating ring 7 includes a radial outer insulating ring 701 and an axial outer insulating ring 702.
The inner conducting ring 3 is arranged on the rotating shaft 1 and is a rotating part; the outer conductive ring 4 is arranged on the shell 2 and is a fixed part; a flexible ring 5 is interposed between the inner conductive ring 3 and the outer conductive ring 4. The outer side of the inner conductive ring 3 and the inner side of the outer conductive ring 4 are working surfaces, and are provided with groove structures for positioning and mounting the flexible ring 5. Each ring adopts an axial double-layer backup structure, namely, each inner conductive ring 3 and each outer conductive ring 4 are provided with two layers of grooves along the axial direction, the cross section of each inner conductive ring and each outer conductive ring forms a W shape, each groove is internally provided with a flexible ring 5, two layers of parallel connection are used for completing the electric transmission of one ring, the backup of the flexible ring and the inner conductive ring and the outer conductive ring is realized, and the reliability is improved.
Only one flexible ring 5 is arranged in each layer of groove, the relative position of the flexible ring 5 in the circumferential direction is unconstrained, the flexible ring can roll freely, an idler wheel structure is not needed, the flexible ring can adapt to high-rotation-speed rotation, collision or motion interference of the flexible ring during rotation is avoided, and meanwhile friction force generated during operation is reduced. The positions of the flexible loops in fig. 2 are only schematic and may not actually be in the same phase.
The diameter of the flexible ring 5 is slightly larger than the distance between the grooves of the inner conductive ring 3 and the grooves of the outer conductive ring 4, so that the flexible ring 5 has a certain precompression amount, and reliable contact with the grooves of the inner conductive ring 3 and the outer conductive ring 4 is ensured. The precompression amount should be reasonably designed, if too small, the contact is unreliable, and the contact resistance and the electric noise are increased; if the flexible ring is too large, fatigue failure of the flexible ring occurs after long-term rotation, and the service life is influenced. The contact stress caused by the precompression should be designed to be below the fatigue limit stress of the material with some margin so that the flexible ring will not experience fatigue failure. In addition, in order to ensure long service life and reliable operation, the surface quality of the flexible ring should be strictly controlled, and the conditions of scratch, bulge, pit, size out of tolerance and the like cannot be caused.
Each loop is overlapped along the axial direction, an inner insulating ring 6 is arranged between two adjacent inner conductive rings 3, and an outer insulating ring 7 is arranged between two adjacent outer conductive rings 4. The inner insulating ring 6 includes a radially inner insulating ring 601 and an axially inner insulating ring 602, and the outer insulating ring 7 includes a radially outer insulating ring 701 and an axially outer insulating ring 702. The radial inner insulating ring 601 ensures that the inner conducting ring 3 is insulated from the rotating shaft 1, the radial outer insulating ring 701 ensures that the outer conducting ring 4 is insulated from the shell 2, a small rotating gap is reserved between the axial inner insulating ring 602 and the axial outer insulating ring 702, and the adjacent loops can be prevented from entering the adjacent loops while reliable insulation is ensured.
Labyrinth seals 8 are provided at both ends of the device multi-loop to prevent unwanted materials from entering the interior.
An inner spring 9, an inner spring pressing plate 10, an outer spring 11 and an outer spring pressing plate 12 are arranged at one end of the device multi-loop, the spring pressing plate is screwed by screws to compress the springs, a certain axial pretightening force is respectively provided for the inner conductive ring and the outer conductive ring, and the inner conductive ring and the outer conductive ring can be ensured to keep correct relative positions under the environments of vibration, impact, high temperature, low temperature and the like.
Because the device does not contain a bearing, the device is supported and rotated by means of an assembled mechanism bearing during use, so that the relative positions of the rotating shaft and the shell are ensured by adopting a tool during assembly and transportation, and the tool is removed during installation to the mechanism. By rationally designing the pre-compression of the compliant ring, the device itself can be guaranteed to have a certain radial stiffness even without bearings.
The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments. Even if various changes are made to the present utility model, it is within the scope of the appended claims and their equivalents to fall within the scope of the utility model.
Claims (8)
1. A rolling rotary electric transport device, comprising: the device comprises a rotating shaft, a shell, an inner conductive ring, an outer conductive ring, a flexible ring, an inner insulating ring and an outer insulating ring;
the inner conductive ring is arranged on the rotating shaft, the outer conductive ring is arranged on the shell, a first groove is formed in the inner conductive ring, a second groove is formed in the outer conductive ring, and the positions of the first groove and the second groove are opposite;
the flexible ring is arranged between the first groove and the second groove and is used for realizing continuous electric transmission from the inner conductive ring to the outer conductive ring;
overlapping a plurality of loops along the axial direction, wherein each loop consists of the inner conductive loop, the flexible loop and the outer conductive loop; the inner insulating rings are arranged between two adjacent inner conductive rings, and the outer insulating rings are arranged between two adjacent outer conductive rings.
2. The rolling and rotating electrical transmission device of claim 1, wherein the first and second grooves are each of a double-layered groove structure, W-shaped; the flexible ring is arranged in each layer of groove.
3. A rolling and rotating electrical device according to claim 2, wherein one of said flexible rings is mounted in each layer of grooves.
4. The rolling, rotating electrical transmission device of claim 1, wherein a diameter of the flexible ring is greater than a distance between the first groove and the second groove such that the flexible ring is in reliable contact with the inner and outer conductive rings.
5. The rolling and rotating electrical machine of claim 1, wherein the inner insulating ring includes a radially inner insulating ring for insulating the inner conductive ring from the shaft and an axially inner insulating ring for insulating between adjacent inner conductive rings.
6. The rolling and rotating electrical device of claim 1, wherein the outer insulating ring includes a radially outer insulating ring for insulating the outer conductive ring from the housing and an axially outer insulating ring for insulating between adjacent outer conductive rings.
7. The rolling and rotating electrical device of claim 1, wherein labyrinth seals are fixedly provided at both ends of the plurality of loops to prevent foreign objects from entering the loops.
8. The rolling, rotating, electrical transmission device of claim 1, wherein one end of the plurality of loops is provided with an inner spring assembly for providing axial preload to the inner conductive ring and an outer spring assembly for providing axial preload to the outer conductive ring.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2022111064355 | 2022-09-12 | ||
| CN202211106435 | 2022-09-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219477199U true CN219477199U (en) | 2023-08-04 |
Family
ID=87436154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223560360.6U Active CN219477199U (en) | 2022-09-12 | 2022-12-30 | Rolling rotary electric transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219477199U (en) |
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2022
- 2022-12-30 CN CN202223560360.6U patent/CN219477199U/en active Active
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